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0--6382 ``Establish Effective Lower Bounds of Watershed Slope for Traditional Hydrologic Methods''

Project Kick-Off Meeting

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Agenda.
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\item Review the TxDOT PD materials as per PD and PMC guidelines.
\item Review proposed effort and approach as envisioned by RS as of today.  List primary researchers for each task.
\item Other issues as raised by PD, PMC
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Four tasks:
  
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\item Task 1 Literature review:  Two foci; Find existing literature specifically related to low slope hydrology or effect of slope on runoff production.  Find existing literature on monitoring techniques or measurement in low slope environments. (Cleveland, Thompson, Fang)

\item Task 2 Database and Model Analysis:  Adapt Su Fang computer program and compare to Ming-Han's filed plot experiments.  Use to design repeat experiments using TAMU rainfall simulator and plots -- will allow us to address process significance. Investigate use of single spatial dimension hydraulic models to estimate the speed of flow under different input conditions in anticipation of parameterizing an equation like Equation (5) (Repeated below) in the research proposal.  Adapt DTRM model to incorporate momentum and pressure as an alteranate tool for the parametric study. (Fang, Ming-Han)
\begin{displaymath}
T_c=C_{outlet} \times \frac{n^{\beta_1}L^{\beta_2}}
{i^{\beta_3}(S_{LB}+S_0)^{\beta_4}}%(S_{LB}+S_0)^{\beta_4}   }
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\item Task 3A:  Apply models and conduct repeat highly controllable physical experiments at TAMU (using the rainfall simulator), conduct semi-controllable experiments at TAMU and TTU (East Loop Lab Parking Lot) using currently available technology. Goal is primarily to find values or sets of values for equation 5.  (Ming-Han, Fang, Cleveland)

\item Task 3B: Design of Low-Slope data acquisition program.  The ability to meaningfully acquire hydrologic and even hydraulic data in low and zero slope environments does not exist outside the laboratory.  The RS is of the opinion that the process from a practical design point of view is a storage-drainage issue and the ability of measure depth versus time over a spatial network is crucial.  Such measurements are relatively trivial except for the requirement that  an independent depth reference must be recorded to adjust the instruments (maintaining an instrument zero on an electronic depth gage is difficult in the laboratory, nearly impossible in the field.)

Goal is to develop and design prototype technologies that could support a future monitoring program. (Asquith, Cleveland)

\item Task 4 : Reporting as per deliverable list.  The research team expects to produce a procedure to estimate time (or speeds of flow) in low slope conditions that is compatible with existing methods in use, but produces times that are realistic as supported by data discovered in literature and in small-scale experiments. (Cleveland, Thompson)  

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